AI product & model operations · Working

Test data

Also called: test set

ELI5

Unseen data used to check how well the model works.

Used in conversation

“The test data reflects current production conditions.”

Definition

Data held aside to evaluate a trained model's performance.

Here “Test data” means: Data held aside to evaluate a trained model's performance.

Pitch context

You will see “Test data” in product strategy decks, roadmaps, experiments and architecture reviews when the discussion reaches ai product & model operations.

Why it matters: In ai product & model operations, the scope can change what data may be used, who may access it and which controls are required.

Sources & evidence · 2

Direct term-level sources and supporting source families.

National Institute of Standards and Technology — Computer Security Resource Center GlossaryDirect source · primary · checked 2026-08-16
Scrum Guides — The Scrum Guide — official current versionSupporting source family · primary · checked 2026-08-16